Solvent for acetyl cellulose.



T for Acetyl Cellulo'se, (if

I sitization.

, .un1rED'sTAT s P TENT oFFIo I OF NEW YORK, N. Y., A CORPORATION OF NEWJERSEY.

sonvnnr FOR AGElTYL cnmm.osn;

No Drawing.

the-city of New York, county of New York,

State of New York, haveinventedgcertainnew and useful Improvements inSolvents which the following is a specification. a

The various compositions vto which the present invention relates areemployed in.

the arts, sometimes as imitations of natural substances and sometimes asfilms which arei used for photographic purposes, whether as the baseupon which the sensitivecoating is" superimposed, or as aoomponentpartothe'film with which the sensitized substande has beenpartially incorporated in the serif Although the final or differentcompounds of acetyl cellulose is that of a solid "or dried material, thediilei' -j ent rocessesnof conversion into this final SOll,form-involve; as-is well understood, the" {employment of solutions ormlxtures .of

varying consistencies as to plasticity, still?- ness or fluidity,dependent; generally upoii .the proportion and kind of solventused totlulose.

facture of 'laoquers,

as. ing point of 129 (1., a strong solvent.

the amount of the original base acetyl cel- In. the treatment, of acetylcellulose to the production, ofjsolutlions for the man 1 irarnishes,photograph'cfilms and flexible or plastic compounds, I have discoveredthat ethylenechldrhydrlin, CH CICHL OH a compound having faboil powerfor 'acetyl cellulose and solutions made therefrom show a\high viscosityand volatilize slowly. This solvent may beused either alone orm'conjunction with other solvents 'or non-solvent liquids or solids,such as'alc'ohol, ether, acetone, ethylacetate, camphor and itssubstitutes, etc.-

It will be understood by those skilled in the art that acetone,for'inst'ance, is asolvent by itself of some varieties'of acetyl jcellulose,and it will likewise be understood that alcohol and ether arenon solvents,

Specification)! Letters Patent.

useful form of th while again, are solvents; This will instructthe oerconjunction with substances such" as I'have [indicated which, eitheras solvents in them? in themselves, 'are'used to restrain the volaphericexposure should he used to accomplish the object. f v Y As one exampleof a method of carrying follows: I take one part of acetyl cellulose andintroduce it into ten parts (by weight) bf ethylenechlorhydrin and mixthem thoroughly by stirring' at the ordinary tern,-

l-uponthe length of time l-du'oed by the use of, 1lhy.new solvent, but

,those' actions and res understood by thoseski led in-the art. WhatIclaimand desire to secure by Letters Patent-is: r 1. A newcomposition-of matter, consist ing of a solution of acetyl cellulose inethyl enechlorhydrin.

" -2; A newicomposition of matter consistlts will be readilyethylenechlorhydrin in admixture with o'ther' substances either inliquid or solid Storm,

. 3; A ing of a solution of acetyl cellulose, in ethylenechlorhydr'in inadmixture with other substances with the accompaniment of inert mattersto form solid or liquid com-- pounds. i lVILLIAM G.- LINDSAY.-Witnesses? I J. E/HINDON HYDE, MABEL DENTON.

epichlorhydrin and chloroform ator that my new solvent may he useinselves for .acetyl cellulose or as non-solvents WILLIAM G; LINDSAY, onNEW YORK, .N, Y.,;ASSIGNOR {r0 run cELLuLoIn COMPANY,

, Patented May 28,1912. Application filed August 10,1911. Serial No.543,372. 1 L i tility of the other ingredients to adapt the compound.for the individual purposes for. which it is to'b used-andwhat varyingdey gresof temperature, pressure and atmos-f outmyinvention practicallyI proceed, as e new composition of matter consist-

